S-90096A309 8-32 x 3/8" ASME B18.6.3, SAE J933 Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior thread cutting performance for reliable tapping in aluminum, brass, cast iron, and sheet metal without pre-tapped holes
- Enhanced corrosion resistance with zinc-plated steel construction, ensuring longevity in demanding industrial environments
- High-torque installation capability via external hex drive and flanged head design for secure, vibration-resistant fastening
- Optimized coarse UNC threading (8-32) providing excellent grip and reduced cross-threading risk in various materials
- Full threading along 3/8" length delivers maximum holding power and uniform stress distribution
- Precision-engineered dimensions including 1/4" head width and 0.348" flange diameter for consistent flush mounting
- Comprehensive regulatory compliance meeting ASME B18.6.3 mechanical specifications and RoHS 3 environmental standards
Professional Applications & Engineering Value
These thread cutting tapping screws solve critical fastening challenges in metalworking and fabrication applications. The zinc-plated steel construction combined with UNC coarse threading enables direct installation into aluminum, brass, cast iron, and sheet metal without requiring pre-tapped holes, significantly reducing assembly time and labor costs. The flanged hex head design provides superior bearing surface distribution while the external hex drive accommodates high-torque applications. Engineered for thread cutting efficiency, these screws create precise mating threads that resist vibration loosening, making them ideal for automotive components, electrical enclosures, and machinery assemblies where reliable fastening is critical.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications (SAE J933) with UNC 8-32 coarse threads and standard inch dimensions including 3/8" length, 1/4" head width, and 0.348" flange diameter. Features Class 2A thread tolerances for proper fit and fully threaded shank design. Compliant with RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use in various industrial applications. Recommended drill bit size: No. 26 (0.147" diameter) for optimal thread engagement.
